How Glasses Work to Correct Vision

Описание: You may have to wear glasses. How do they work? When you are farsighted ( hyperopia) objects far away are clear but object close appear blurry. This type of problem can be fixed with a convex lens. A concave lens is used to fix the opposite problem created when you are nearsighted.
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http://www.moomoomathblog.com/2020/09...